Carbureter



H. I. HAWXHURST. CARBURE TER. APPLICATION FILED OCT. 2. 1916.

mea e Patented Dec. Me 1920.

ATTOYRN 51X.

- improved carburetor.

ment of Yenturi tube 16.

HENRY I. HAVJXHURST, 0F MAIDEE, CALIFORNIA.

UAEBU Specification of Iletters Patent.

Patented Doc. to, lean.

' Application filed fictober 2, 1916. fierial No. 128,228.

is desired to empty the float chamber. At some point in its upper portion casino 534) is expanded outward to form what 1 term a valve chamber- 34 This is preferably at the point :l'arthest from the mixing pip e A lever 35 is pivotally mounted in the side walls of the valve chamber by bolt 36.

The object of my invention is to produce a float operated valve tor a carburetor in which the valve which controls the admission of fuel into the float chamber is regulated by a hollow celluloid ball; and the object thereof 'is to operate the valve b -m eans of a ball that expands and diminishes in size as the temperature rises and Falls whereby the fuel supply is opened and cut off sooner or later than would be the case if a hall were'used .whose size was not influenced by the temperature of the fuel.

A further object is to operate the inlet valve of the float chamber by means that will not be objectionably atleeted by the vibration oi the engine when the vehicle passes over an obstruction or into a depression and which will respond to barometric and thermal conditions.

The drawings forming a part of this ap-' plication is a central vertical section of mv Referring to the drawings it) is cylindrical casing having a flange 11 at its upper end, by means of which it is secured to the intake manifold. In this casing is mounted the usual butterfly valve 12 which is provided with handle or lever controlled in the usual well known manner. Projecting from the lower end of casing 10 is the mixin" pipe l ihaving an inturned flange 1:; at 1ts upper end to stop the upward move- The lower end of the mixing pipe rests upon the casing li'ot' the inlet duct 18 which forms a part oi ledge 19 that projects from the bottom of casing; 20.

The main portion of casing Ellis cylin-.

Lever 35 carries a needle valve 37 which controls port 38 in the bottom of the valve chamber. A. hollow celluloid ball 39 rests on the liquid fuel {l0 iii-chamber 31 and when the liquid rises to a predetermined height it engages lever 35 and operates valve 37 to out off the flow of fuel into the float chamber. By the use of a detached hollow cellu loid hall in the float chamber of less di ameter than the diameter of the chamber and by placing: the float chamber in such relation to the mixing pipe that it will be directly before it when the machine, is Cllfliih mg a hill. 1 accomplish several important results. By the use of a. hollow celluloid ball when the air is cold in the morning the ball contracts and a greater supply of fuel is admitted into-the float chamber than when ill. ir is warm. When the air is warm the ball eiq'mnds and shuts oil the supply of fuel into the float chambers sooner. than when the air is cold. When a metal float is used to control the valve lever of the valve which controls the flow of fuel to the float cham her and the vehicle goes over an obstruction or into a depression the inertia of the metal. .tloat on the downward thrust carries the .tloat below the desired level and allows an excess of fuel to flow into the chaurnber thereby raising; the level above the normal operating level and causing an excess of liquid passing out of the spray jet thus wasting fuel. By using a hollow celluloid bail to control such valve lever the vibration does not atl'ect the inlet valve as the hall is too light to dip down into the liquid and no change of liquid level in-the float cl'iamber. takes place by reason of such vibration. ll' hile l have illustrated the float as a round hall it is obvious that the shape may be varied without dciartin from the siirit a detached l ollow celluloid'ball float in said chamber, adapted to operate said leyer to 10 out off the supply of liquid when it rises to in a fuel admission port 3 a valve to control said port, a lever to control said'valve; and

a hollow celluloid float to operate said lever;

whereby the supply of liquid is out off when a predetermined. height it rises to a predetermined level. In Witness that l claim the foregoing 2. In a carbureter, :1 flout chamber lmvhavelleqeuntosubscribedmynametliis19th ing a fuel admission port, u valve to control day of September, 1916.

H. l. l'll-VXl-HIRST.

said port; a lever to control said valve; and 

